i have been using what i think is a stock navigation program that had a blue triangle as it's icon. Somehow, it disappeared. I went to the play store and could not find it. i called support and they told me that "Maps" replaced it. i used Maps yesterday and found it worthless, taking me down dead end streets and off and on freeways. Do you know how i could get it back or do you know of a good/better nav app?